Stereo dies out after driving for a while

[samari]

Hello all,

i am not sure if i have an electrical issue in my cressida 91, but my stereo always dies out after driving the car for a while. If i lower or raise the windows (electrical) when the stereo dies out or stops working, it starts working as long as i am pressing on the window button. This means as long as i have something electrical working in the car, the stereo will start working again. Even signaling makes it work again!

This is why i think it is electrical issue. Does anyone have an idea on how to fix this problem?